| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump reduced in size, eliminating auxiliary machines such as an oil pump for supplying lubricating oil, an oil pipe and a cooling device for lubricating oil, etc., and making the contact of a shaft with a bearing difficult, even if lubricating the pump with handled fluid (water). SOLUTION: Journal bearings 51 and 61 provided with sealing functions are provided on at least two or more portions between a core plate side cylinder part 42 of impellers 4 of an uniaxial multistage pump having the plurality of impellers 4 arranged on multistage and a diffuser member 5 or between an axial direction part 43 of a side plate and a stage 6. Thrust bearings 17a and 17b are provided on at least one or more portions between the core plate side disc part 42 of the impellers 4 and the diffuser member 5. In the journal bearings 51 and 61 or the thrust bearings 17a and 17b, positive pressure is generated over the entire of the peripheral direction. COPYRIGHT: (C)2004,JPO
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